摘要:
The subject invention is a commercial device to effectively remove NOx and other pollutants from an exhaust gas stream. Microwave enhancement of oxidation/reduction catalysis is selectively employed as the exhaust gas stream traverses a bed of catalyst particles, which may operate as either a fixed or fluidized bed. An unique feature involves the conventional, non-microwave, conversion of NO to NO2; however, the subsequent reaction of reducing NO2 is microwave enhanced.
摘要:
Gaseous decomposition from a solution is enhanced in the presence of activated carbon or its equivalent by radiofrequency energy in the microwave range. An important example is wet calcination using solutions containing bicarbonates, such as trona, where good conversion to carbonate is readily obtained. A further example is the excellent stabilization of solutions containing sulfites and bisulfites.
摘要:
A system and method for destruction of energetic compounds, medical wastes and unwanted pharmaceuticals using microwave energy. Waste materials are first mixed into a dilute water solution, slurry or emulsion. The dilute waste flows to a first microwave reactor containing silicon carbide. The silicon carbide absorbs the microwave energy, heats and vaporizes the liquid. The vapor flows to a second microwave reactor containing silicon carbide and an oxidation catalyst. Air is added and the waste portion of the vapor is oxidized to carbon dioxide. Water is recovered in a condenser and recycled. Carbon dioxide and remaining air is vented. Solid organic wastes such as contaminated disposable gloves and towels are gasified in a first microwave reactor with air and oxidized in the second microwave reactor.
摘要:
A process of air purification occurs in the presence of activated carbon or its equivalent by decomposing adsorbed hazardous materials, such as volatile organic compounds, on the carbon surface by radiofrequency energy in the microwave range at near ambient conditions of temperature and pressure. Further microwave oxidation to nonhazardous gases occurs in the presence of an oxidation catalyst.
摘要:
A technique is provided for igniting one in situ oil shale retort with flue gas from an earlier retort. Towards the end of oil shale retorting the flue gas from an in situ retort has a substantial fuel value so that it can be burned for generating heat. This fuel gas is conveyed to the entrance to a second retort and burned to initiate retorting. Even after retorting of the bed of particles in the first retort is completed, a fuel rich flue gas can be obtained and used for ignition of a subsequent retort. In either case the prior retort has a large bed of hot spent oil shale particles through which air is passed to burn carbonaceous material therein. Hot flue gas from the earlier retort can also be used for preheating.
摘要:
Granulated Activated Carbon (GAC) is used to remove hydrogen sulfide (H2S) from the biogas produced in an anaerobic digester. The cleaned biogas is then combusted in a reciprocating engine. The exhaust of the engine is passed through a heat exchanger and then through GAC in an adsorber to adsorb nitrogen oxides (NOx) and any sulfur oxides (SOx). The GACs containing NOx, H2S, and SOx, are transported to a microwave reactor, mixed, and exposed to microwave energy. The H2S and NOx are desorbed from the GAC and chemically combined to produce nitrogen, carbon dioxide, sulfur and water. Unreacted nitrogen oxides or hydrogen sulfide are transported to a second reactor containing carbon media to be reacted by a further microwave process. Sulfur is removed with a filter as a solid and the remaining inert components are vented to the atmosphere. The GAC is regenerated and reused to remove additional H2S and NOx.
摘要:
The subject invention provides a potentially economically viable process for the microwave destruction of contaminated waste consisting essentially of chemical and biological agents and harmful medical waste by employing carbonaceous materials to enhance the efficiency of the microwaves while keeping the bulk temperature down to a modest rise.
摘要:
The present invention provides a potentially economically viable process for the efficient microwave catalysis production of hydrogen involving a modified steam-reforming reaction using light hydrocarbons or light alcohols as the basic reactant with potentially supplementary oxygen to increase the efficiency. Such hydrogen-rich gas is potentially an economical fuel for fuel cells.
摘要:
A process of gas purification occurs in the presence of radiofrequency microwave energy and carbonaceous material by decomposing adsorbed impurities on a bed surface at near ambient conditions of temperature and pressure. Further microwave enhanced catalytic oxidation to purificatory gases normally occurs.
摘要:
Wet oxidation is enhanced in the presence of carbonaceous material by oxidizing adsorbed organic materials, such as hydrazine and various solvents which may contain, or have dissolved or mixed compounds containing, chlorine molecules, on the carbon surface by radiofrequency energy in the microwave range at near ambient conditions of temperature and pressure. The discharged water is substantially environmentally clean.